It was the midfielder's first Spurs game since returning from an indifferent loan spell at QPR and he looked determined to make his mark.
Dean set-up the first goal for Rohan Ricketts, the second for Jamie Redknapp and capped his own performance with the third goal, a fine finish from Rohan's pass.
"I thought Dean was terrific," said Pat, in charge of the side in Clive Allen's absence."His decisions were good, his movement was good with the ball, he played and moved and he was excellent.
"The last goal was great as well, a lovely ball from Rohan and a great finish. Dean plays on confidence a little and he needs games like that to believe in himself but I couldn't fault him, he deserved everything he got out of the game."
Pat conceded that Southampton started well in both halves but we were clinical in front of goal to secure the win after Dexter Blackstock levelled Rohan's first half opener.
"The first goal was against the run of play but good luck to us," added Pat. "They upped it a little in the second half and it became difficult. We needed to change it slightly and bolster the midfield but it worked out well in the end."
Pat Holland was delighted with the contribution of Dean Marney as the reserves beat Southampton 3-1 last night.